LtCol Celotto enlisted in the Marine Corps in October 1996 and was an Honor Graduate from 2d Recruit Training Battalion, MCRD Parris Island. Upon completion of recruit training he reported to Infantry Training Battalion, School of Infantry, Camp Geiger, NC for MOS training as an Anti-Tank Assault Guided Missleman (0352).  In July 1997, Private First Class Celotto reported for duty with 2d Battalion 8th Marine Regiment where he served as a TOW Gunner with Weapons Company, Combined Anti-Armor Team 2. While assigned to 2/8, he participated in Combined Arms Exercise 9, Mountain Warfare Training Center’s Winter Warfare Package, and the Unit Deployment Program in Okinawa, Japan.   
In August 1998, Lance Corporal Celotto was selected for the Enlisted Commissioning Program and subsequently graduated from Officer Candidates School, The Basic School, and Communications Information Systems Officer Course, Quantico, Virginia. In March 2000, Second Lieutenant Celotto reported for duty with 2d Battalion 10th Marine Regiment, Camp Lejeune, North Carolina. During his tour at 2/10 he served as Communications Officer, S-6, and as Headquarters Battery Commander.  Additionally, he served as S-6A for Special MAGTF 10 on board the USS John F. Kennedy for International Naval Revue 2000 in New York City and as the Adjutant, S-1 for Special MAGTF 10 in support of Fleet Week 2001.

In May 2002, First Lieutenant Celotto transfer to 2d Tank Battalion for duty as Communications Platoon Commander, S-6, and was frocked to Captain in June 2002.  In December 2002 the Battalion deployed to Kuwait and was attached to 5th Marine Regiment in preparation for the invasion of Iraq.  Captain Celotto returned from Iraq in May 2003 and reported to Command and Control Systems School for duty as Instructor and Faculty Advisor for the Communications and Information Systems Officer Course.  After spending a year in that billet, Captain Celotto was selected to be the Aide de Camp to the Deputy Commanding General, Marine Corps Combat Development Command.  In July 2005, Captain Celotto reported to Expeditionary Warfare School and graduated in May 2006.  

In June 2006, Captain Celotto reported for duty as Operations Officer, Marine Wing Communications Squadron-28, Cherry Point, North Carolina. In October 2009, Captain Celotto took command of Company A in preparation for deployment in support of Operation Iraqi Freedom 06-08.  In November 2008, Captain Celotto was frocked to Major and reported as an Individual Augment to Joint Task Force Horn of Africa in Djibouti and acted as Liaison Officer to US Africa Command Headquarters.  Returning from Africa in May 2009, Major Celotto reported to Marine Corps Command and Staff College and Graduated in June 2010.  
Following graduation, Major Celotto began a 36 month Joint Duty Assignment List (JDAL) position with the Defense Information Systems Agency as a Senior Communications Watch Officer with the Joint Staff Support Center, the Pentagon.  In that role, he leads a Joint Service team of communicators providing support to the Deputy Director for Operations, J-33, the Joint Staff, in the National Military Command Center. During that assignment he and his team supported the Joint Staff during Operations Odyssey Dawn, Tomodachi, Enduring Freedom, and the Osama bin Laden raid in Pakistan.
In July 2013, Major Celotto reported for duty as the Communications Officer, S-6, for the 24th Marine Expeditionary Unit (24 MEU) aboard Camp Lejeune, NC.  With the Command Element headquarters, he deployed to Moron Air Base, Spain as part of Special Purpose Marine Air Ground Task Force, Crisis Response (SPMAGTF, CR) and began planning and training for contingencies in northern and western Africa.  During that deployment, SPMAGTF, CR was tasked to support the U.S. embassy in South Sudan to assist with the departure of American citizens who were caught up in the country’s civil unrest.  Returning to Camp Lejeune in January 2014, the Command Element immediately turned to pre-deployment training for a MEU deployment to Africa, European and Central Commands’ areas of responsibility.  Embarking aboard the Amphibious Ready Group Iwo Jima in December 2014, the MEU transited the Mediterranean and Red Seas to take up patrolling off the coast of Yemen in support of the U.S. Embassy in Sanaa, Yemen and the U.S. Special Forces compound in Aden, Yemen.  The MEU facilitated planning and execution of the ordered departure of both locations during that nation’s internal strife.
The MEU returned to Camp Lejeune in July of 2015 and shortly after, Major Celotto was promoted to Lieutenant Colonel and transferred to Headquarters Marine Corps C4 Department for duty as an action officer in the Network Plans and Policies Division working on unifying the Marine Corps Enterprise Network.  In September 2016, LtCol Celotto assumed the duties of Deputy Division Chief for Network Plans and Policies and in July 2017 the position of Operations Officer for the Strategic Plans Division. 
In June of 2014 LtCol Celotto assumed his current position as Military Assistant to the Principle Deputy Chief Information Officer for the Department of Defense.

LtCol Celotto holds a Bachelor’s Degree in Political Science from Canisius College, a Master’s in Business Administration and Management from Boston University and is a graduate of the Joint and Combined Warfighting School.